Symptom Troubleshooting [Engine]

• Foreword
• Engine OBD II Monitors
  • Notes
  • Catalyst Efficiency Monitor - Federal Test Procedure
  • Comprehensive Component Monitor
  • Evaporative Emission (EVAP) Vapor Management Flow System Monitor
  • Evaporative Emission (EVAP) Running Loss System Monitor
  • On-Board Refueling Vapor Recovery (ORV) Evaporative Emission (EVAP) System
  • Exhaust Gas Recirculation (EGR) System Monitor
  • Fuel System Monitor
  • Typical Fuel System Monitor Entry Conditions:
  • Typical Fuel Monitor Malfunction Thresholds:
  • Heated Oxygen Sensor (HO2S) Monitor
  • Misfire Detection Monitor
  • Malfunction Indicator Lamp (MIL)
• Electronic Engine Control (EEC) System
  • Notes
  • Powertrain Control Software
    • Multiplexing
    • Standard Corporate Protocol
    • Flash Electrically Erasable Programmable Read Only Memory
    • Making Changes to the VID Block
    • Making Changes to the PCM Calibration
    • Idle Air Trim
    • Fuel Trim
    • Failure Mode Effects Management
    • Engine RPM/Vehicle Speed Limiter
  • Powertrain Control Hardware
    • Smart Junction Box (SJB)
      • Keep Alive Random Access Memory (RAM)
      • Hardware Limited Operation Strategy (HLOS)
      • Integrated Electronic Ignition System
  • Power and Ground Signals
    • Vehicle Power
    • Vehicle REFERENCE Voltage
    • Mass Air Flow Return
    • Signal Return
    • Power Ground
    • Gold Plated Pins
  • Fuel Systems
    • Mechanical Returnless Fuel System
  • Exhaust Gas Recirculation Systems
    • Overview
    • Differential Pressure Feedback EGR (DPFE) System - Overview
    • Electric EGR System (EEGR) - Overview
  • Evaporative Emissions System Outline
    • Overview
  • Intake Air Systems
  • Positive Crankcase Ventilation System
    • Overview
  • Catalyst and Exhaust Systems
    • Overview
  • Communication Error
  • Vehicle Check/Preparation
    • Visual Checks
    • Vehicle Preparation
  • Intermittent Diagnostic Techniques
    • Notes
    • Re-creating the Fault
    • Conditions To Re-Create Fault
    • Accumulating PCM Data
    • Analyzing Data From Playback of Stored PIDs
    • Comparing PCM Data
    • Diagnostic Monitoring Test Results
    • Diagnostic Monitoring Test Results Table
  • On-Board System Readiness
    • Description
  • Freeze Frame Data
    • Description
  • Output Test Mode
    • Description
  • Powertrain Control Module (PCM) Reset
    • Description
    • Resetting Keep Alive Random Access Memory (RAM)
    • Resetting Keep Alive Memory (KAM)
• On-Board Diagnostic Tests
  • On-Board Diagnostic (OBD) Test Description
    • Notes
    • Quick Test
    • Key On Engine Off (KOEO) On-Demand Self-Test
    • Key On Engine Running (KOER) On-Demand Self-Test
    • Brake Pedal Position Test
    • Transmission Control Switch Test
    • Power Steering Pressure Test
    • Continuous Memory Self-Test
    • Output Test Mode Procedure
• Drive Cycles
  • Description of OBD II Drive Cycle
  • Drive Cycle Recommendations
  • Vehicle Preparation
  • OBD II Drive Cycle
  • Monitor Repair Verification Drive Cycles
    • Comprehensive Component Monitor Repair Verification Drive Cycle
  • EGR Monitor Repair Verification Drive Cycle
  • HO2S Monitor Repair Verification Drive Cycle:
  • Fuel or Misfire Monitor Repair Verification Drive Cycle:
  • EVAP Running Loss System Repair Verification Drive Cycle:
  • Catalyst Monitor Repair Verification Drive Cycle:
• DTC Index - Powertrain Control Module (Pcm)
• DTC Application Chart - Powertrain Control Module (Pcm)
• Pcm Quick Test
  • Notes
  • DTC P0102, P0103, P1100 & P1101: Mass Air Flow (MAF) Sensor
  • DTC P0107, P0108 & P0109: Manifold Absolute Pressure (Map) Sensor Malfunction (2.3L)
  • DTC P0112, P0113, P0117, P0118, P0125, P1112, P1116, P1117, P1285, P1288, P1289, P1290 & P1299: Intake Air Temperature (IAT) Sensor And Engine Coolant Temperature (ECT)/Cylinder Head Temperature (CHT) Sensor
  • DTC P0121, P0122, P0123, P1120, P1121, P1124 & P1125: Throttle Position (TP) Sensor Circuit Malfunction
  • DTC P0131 & P0151: Heated Oxygen Sensor (Ho2S)
  • DTC P0133 & P0153: Heated Oxygen Sensors (Ho2S) Upstream
  • DTC P0135, P0141 & P0155: Heated Oxygen Sensor (Ho2S) Heater Circuit
  • DTC P0136, P1137 & P1138: Heated Oxygen Sensor (Ho2S)
  • DTC P0171 & P0174: Adaptive Fuel Control
  • DTC P0172 & P0175: Adaptive Fuel Control
  • DTC P0201, P0202, P0203, P0204, P0205 & P0206: Fuel Injector Malfunction
  • DTC P0230, P0231 & P0232: Fuel Pump (FP) Primary Or Secondary Circuit
  • DTC P0300, P0301, P0302, P0303, P0304, P0305 & P0306: Misfire Detection Monitor
  • DTC P0320: Crankshaft Position (CKP) Sensor Malfunction
  • DTC P0325 & P0326: Knock Sensor Malfunction
  • DTC P0340: Camshaft Position (CMP) Sensor Malfunction
  • DTC P0350: Ignition Coil Primary Circuit Malfunction
  • DTC P0351, P0352, P0353 & P0354: Integrated Ignition Coil 1, 2, 3, Or 4 Failure
  • DTC P0400, P0403 & P1408: Electric EGR (EEGR) System Malfunction - 2.3L
  • DTC P0420 & P0430: Catalyst Efficiency Monitor Malfunction
  • DTC P0442: Evaporative Emission (EVAP) Monitor And System Malfunction
  • DTC P0443: Evaporative Emission (EVAP) Canister Purge Solenoid Malfunction
  • DTC P0461: EVAP System Malfunction
  • DTC P0452: Fuel Tank Pressure (Ftp) Sensor Malfunction
  • DTC P0453: Fuel Tank Pressure (Ftp) Sensor Malfunction
  • DTC P0455 & P1443: Evaporative Emission (EVAP) System Malfunction
  • DTC P0457: Evaporative Emission (EVAP) System Malfunction
  • DTC P0460: Fuel Level Input (FLI) Circuit Malfunction
  • DTC P0505, P1504 & P1507: Idle Air Control (IAC) Valve Assembly Malfunction
  • DTC P0603 & P1633: Powertrain Control Module (Pcm) Malfunction
  • DTC P0703 & P1703: Brake Pedal Position (BPP) Switch Malfunction
  • DTC P0704 & P1709: Clutch Pedal Position (CPP) Switch Malfunction
  • DTC P1000: OBD-II Drive Cycle Malfunction
  • DTC P1001: Data Link Connector (DLC) Malfunction
  • DTC P1127: Ho2S Heater(S)
  • DTC P1128: Heated Oxygen Sensor Ho2S Signals (V6 Only)
  • DTC P1130 & P1150: Fuel System Not Switching At Fuel Trim (Rich Or Lean)
  • DTC P1131 & P1151: Heated Oxygen Sensor (Ho2S) Upstream Not Switching
  • DTC P1132 & P1152: Heated Oxygen Sensor (Ho2S) Upstream Not Switching
  • DTC P1260: Anti-Theft System
  • DTC P1270: Engine Rpm/Vehicle Speed Limiter
  • DTC P1309: Misfire Detection Monitor Disabled
  • DTC P1432: Thermostat Heater Control (THTRC) Malfunction (2.3L)
  • DTC P1450: Evaporative Emission (EVAP) Monitor And System
  • DTC P1451: Canister Vent (CV) Solenoid Malfunction
  • DTC P1460: A/C Clutch Relay (ACCR) Malfunction
  • DTC P1464: A/C Control Signal (ACCS) Malfunction
  • DTC P1474: Cooling Fan Malfunction (2.3L)
  • DTC P1506: Idle Air Control (IAC) System Malfunction
  • DTC P1518, P1519, P1520, P1537 & P1538: Intake Manifold Swirl Control (IMSC) Malfunction (2.3L)
  • DTC P1650 & P1651: Power Steering Pressure (PSP) Switch (2.3L Only) Malfunction
  • DTC P1729 & P1781: Transfer Case Range Malfunction - 4X4 Low (4X4L)
  • DTC P1780: Transmission Control Switch (TCS) Or Transmission Control Indicator Lamp (TCIL) Circuit Malfunction
• Symptom Troubleshooting Chart Engine DRIVEABILITY
  • Notes
  • Starting Concerns
  • Hard Start/Long Crank/Erratic Start/Erratic Crank
  • Cranks Normally But Will Not Start
  • Unique Idle Concern
  • Fast Idle
  • Low Idle/Stalls During Deceleration
  • Engine Poor DRIVEABILITY
  • Backfires
  • Lack/Loss Of Power
  • Knocking/Pinging
  • Poor Fuel Economy
  • Emissions Compliance
  • Mil/TCIL Never On And Mil/TCIL Always On
  • Automatic Transmission Shift Concerns
  • Instrumentation
  • Exhaust System Concerns
  • Fuel Odor In Engine Compartment
  • Engine Noise
  • A/C Does Not Work
  • A/C Always On And A/C Compressor Runs Continuously
  • A/C Does Not Cut-Off Under Wide Open Throttle Conditions
  • Exterior Lighting Systems
  • Exhaust Sulphur Smell
  • All Supported On Board System Readiness Tests Not Completed
  • Fuel Pump Always Runs
• Engine Inspection
• Engine Component Test
  • Engine Oil Leaks - Fluorescent Oil Additive Method
  • Leakage Points - Underhood
  • Leakage Points - Under Engine, With Vehicle on Hoist
  • Leakage Points - With Transmission and Flywheel Removed
  • Compression Test
  • Compression Test - Results
  • Compression Test - Interpreting Compression Readings
  • Cylinder Leakage Detection
  • Oil Leak and Valve Stem Seal Test
  • Oil Consumption Test
  • Excessive Engine Oil Consumption
  • Intake Manifold Vacuum Test
  • Intake Manifold Vacuum Test - Interpreting Vacuum Gauge Readings
  • Oil Pressure Test
  • Valve Train Analysis - Engine Off
  • Valve Train Analysis - Engine Off, Valve Cover Removed
  • Valve Train Analysis - Engine Off, Valve Tappets
  • Valve Train Analysis - Engine Off, Camshaft - Overhead Camshaft Engines
  • Valve Train Analysis - Engine Off, Valve Springs
  • Valve Train Analysis - Engine Off, Valve Spring Retainer and Valve Spring Retainer Keys
  • Valve Train Analysis - Engine Off, Valves and Cylinder Head
  • Valve Train Analysis - Engine Running
  • Valve Train Analysis - Engine Running, Rocker Arm
  • Camshaft Lobe Lift
  • Camshaft Lobe Lift - Valve Tappet, 2.3L, 3.0L and 4.0L Engines
  • Timing Chain - 2.3L, 3.0L and 4.0L Engines
  • Timing Chain Deflection - 2.3L, 3.0L and 4.0L Engines
• Charging System Component Tests
  • Battery - Load Test
  • Battery - Drain Tests
  • Battery - Electronic Drains Which Shut Off When the Battery Cable is Disconnected
  • Generator On-Vehicle Tests
  • Generator On-Vehicle Tests - Load Test
  • Generator On-Vehicle Tests - No-Load Test
  • Battery Condition Test
• Symptom Troubleshooting Chart - Engine Mechanical
• Symptom Troubleshooting Chart - Drive Belt
• Symptom Troubleshooting Chart - Engine Cooling
  • Engine Cooling
  • Cooling System Pinpoint Test 1: Loss Of Coolant
  • Cooling System Pinpoint Test 2: Engine Overheats
  • Cooling System Pinpoint Test 3: Engine Does Not Reach Normal Operating Temperature
  • Cooling System Pinpoint Test 4: Block Heater Does Not Operate Properly
• Exhaust System Symptom Chart
  • Notes
  • Exhaust System Pinpoint Test 1: Restricted Exhaust System Test
• Evaporative Emission System Inspection
• Evaporative Emission Symptom Chart
  • Notes
  • Pinpoint Test 1: Excessive Fuel Odor
  • Evaporative Emissions System Pinpoint Test 2: Hiss When Opening Fuel Cap
  • Evaporative Emissions System Pinpoint Test 3: Unable To Refuel Vehicle
• Symptom Troubleshooting Chart-Charging System
  • Notes
  • Charging System Pinpoint Test 1: The Battery Is Discharged Or Battery Voltage Is Low
  • Charging System Pinpoint Test 2: The Charging System Warning Indicator Is On With The Engine Running (The Charging System Voltage Does Not Increase)
  • Charging System Pinpoint Test 3: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
  • Charging System Pinpoint Test 4: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increases Voltage
  • Charging System Pinpoint Test 5: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
  • Charging System Pinpoint Test 6: The Charging System Warning Indicator Flickers Or Is Intermittent
  • Charging System Pinpoint Test 7: Generator Is Noisy
  • Charging System Pinpoint Test 8: Radio Interference
• Symptom Troubleshooting Chart - Starting System
  • Symptom Troubleshooting Chart
    • Notes
    • Starting System Pinpoint Test 1: Engine Does Not Crank
    • Starting System Pinpoint Test 2: Unusual Starter Noise
• Symptom Troubleshooting Chart - Cruise Control
  • Cruise Control Self-Test Diagnostics
  • Symptom Troubleshooting Chart
    • Notes
    • Cruise Control System Pinpoint Test 1: Cruise Control Is Inoperative-No Flash Codes
    • Cruise Control System Pinpoint Test 2: Set Speed Fluctuates
    • Cruise Control System Pinpoint Test 3: The Cruise Control Does Not Disengage When The Brakes Are Applied
    • Cruise Control System Pinpoint Test 4: Cruise Control Does Not Disengage When The Clutch Is Applied
    • Cruise Control System Pinpoint Test 5: The Cruise Control Switch Is Inoperative
    • Cruise Control System Pinpoint Test 6: Flash With Last Switch Presses But No Dynamic Pull Occurs At The Throttle
    • Cruise Control System Pinpoint Test 7: Flash Code 2-Brake Pedal Position (BPP) Switch Circuit Failure
    • Cruise Control System Pinpoint Test 8: Flash Code 3-DEACTIVATOR Switch Failure
    • Cruise Control System Pinpoint Test 9: Cruise Control Indicator Lamp Is Always On
    • Cruise Control System Pinpoint Test 10: Flash Code 4-Speed Signal Circuit Failure
• Symptom Troubleshooting Chart-Powertrain Control Module (Pcm)
• General Test Index
  • Notes
  • General Pinpoint Test 1: Vehicle Reference Voltage
  • General Pinpoint Test 2: Tachometer Output (CTO) Failure
  • General Pinpoint Test 3: Malfunction Indicator Lamp (Mil)
  • General Pinpoint Test 4: Intermittent
  • General Pinpoint Test 5: Fuel Delivery System
  • General Pinpoint Test 6: Positive Crankcase Ventilation PCV System
  • General Pinpoint Test 7: Pcm Power Relay
  • General Pinpoint Test 8: Crankshaft Position (CKP) Sensor
  • General Pinpoint Test 9: Fuel Pump Inspection
  • Pinpoint Test 10: Fuel Line Pressure/Fuel Pressure Hold Inspection
  • General Pinpoint Test 11: Fuel Injector Inspection
  • General Pinpoint Test 12: No Start
  • General Pinpoint Test 13: Ignition Scope Pinpoint Test